CVE-2019-11743

Public Exploit

Description

Navigation events were not fully adhering to the W3C's "Navigation-Timing Level 2" draft specification in some instances for the unload event, which restricts access to detailed timing attributes to only be same-origin. This resulted in potential cross-origin information exposure of history through timing side-channel attacks. This vulnerability affects Firefox < 69, Thunderbird < 68.1, Thunderbird < 60.9, Firefox ESR < 60.9, and Firefox ESR < 68.1.

Category

3.7
CVSS
Severity: Low
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.99% Top 25%
Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory ubuntu.com Vendor Advisory gentoo.org Vendor Advisory mozilla.org Vendor Advisory mozilla.org Vendor Advisory mozilla.org Vendor Advisory mozilla.org Vendor Advisory mozilla.org Vendor Advisory mozilla.org
Affected: Mozilla Firefox
Affected: Mozilla Thunderbird
Affected: Mozilla Firefox ESR
Published at:
Updated at:

References

Link Tags
https://bugzilla.mozilla.org/show_bug.cgi?id=1560495 vendor advisory issue tracking permissions required
https://w3c.github.io/navigation-timing third party advisory exploit
https://www.mozilla.org/security/advisories/mfsa2019-25/ vendor advisory
https://www.mozilla.org/security/advisories/mfsa2019-27/ vendor advisory
https://www.mozilla.org/security/advisories/mfsa2019-26/ vendor advisory
https://www.mozilla.org/security/advisories/mfsa2019-29/ vendor advisory
https://www.mozilla.org/security/advisories/mfsa2019-30/ vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00010.html vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00009.html vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00011.html vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00017.html vendor advisory
https://usn.ubuntu.com/4150-1/ vendor advisory
https://security.gentoo.org/glsa/201911-07 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2019-11743?
CVE-2019-11743 has been scored as a low severity vulnerability.
How to fix CVE-2019-11743?
To fix CVE-2019-11743, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2019-11743 being actively exploited in the wild?
It is possible that CVE-2019-11743 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2019-11743?
CVE-2019-11743 affects Mozilla Firefox, Mozilla Thunderbird, Mozilla Firefox ESR.
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